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ISO /IEC 8802-6 : 1994 ANSI/IEEE Std 802.6, 1994 Edition (incorporating ANSI/IEEE Std 802.6-1990, IEEE Std 802.6d-1993, and IEEE Std 802.6f-1993) -Description

Abstract: This standard is part of a family of standards for local area networks (LANs) and metropolitan area networks (MANs) that deals with the Physical and Data Link Layers as defined by the ISO Open Systems Interconnection Reference Model. It defines a high-speed shared medium access protocol for use over a dual, counterflowing, unidirectional bus subnetwork. The Physical Layer and Distributed Queue Dual Bus (DQDB) Layer are required to support a Logical Link Control (LLC) Sublayer by means of a connectionless Medium Access Control (MAC) Sublayer service in a manner consistent with other IEEE 802 networks. Additional DQDB Layer functions are specified as a framework for other services. These additional functions will support Isochronous Service Users and Connection-Oriented Data Service Users, but their implementation is not required for conformance.

Content +

  • 1. Overview
    • 1.1 Scope
    • 1.2 Applicability
  • Normative references
  • Definitions
  • Abbreviations and acronyms
    • 1.6 Conformance
    • 1.7 Notation
      • 1.7.1 Service specification method and notation
      • 1.7.2 State machine notation
    • 1.8 Organization of this part of ISO/IEC 8802
  • 2. Overview
    • 2.1 DQDB subnetwork
      • 2.1.1 Dual Bus architecture
      • 2.1.2 Access control to the Dual Bus subnetwork
      • 2.1.3 Provision of DQDB Layer services
      • 2.1.4 Performance of the Distributed Queue
      • 2.1.5 DQDB subnetwork configuration control
    • 2.2 Node functional architecture
      • 2.2.1 Physical Layer functions
      • 2.2.2 DQDB Layer functions
  • 3. DQDB Layer service definition
    • 3.1 MAC service provided to the LLC Sublayer
    • 3.2 Isochronous service
      • 3.2.1 ISU-DATA request
      • 3.2.2 ISU-DATA indication
    • 3.3 Connection-Oriented Data Service
  • 4. Physical Layer service definition
    • 4.1 Ph-DATA request
    • 4.2 Ph-DATA indication
    • 4.3 Relationship of Ph-DATA request primitives and Ph-DATA indication primitives
      • 4.3. Node not performing Head of Bus functions
      • 4.3.2 Node performing Head of Bus functions
    • 4.4 Ph-TIMING-SOURCE request
    • 4.5 Ph-TIMING-MARK indication
    • 4.6 Ph-STATUS indication
  • 5. DQDB node functional description
    • 5.1 Provision of MAC service to LLC
      • 5.1.1 MAC Convergence Function (MCF) block
      • 5.1.2 Queued Arbitrated (QA) Functions block
      • 5.1.3 MAC Sublayer service management functions
    • 5.2 Provision of isochronous service
      • 5.2.1 Isochronous Convergence Function (ICF) block
      • 5.2.2 Pre-Arbitrated (PA) Functions block
      • 5.2.3 Isochronous service provider management functions
    • 5.3 Provision of other services
      • 5.3.1 Connection-Oriented Data Service
    • 5.4 Common Functions
      • 5.4.1 Relaying of slot octets and management information octets
      • 5.4.2 Subnetwork Configuration Control function
      • 5.4.3 Head of Bus functions
      • 5.4.4 MID Page Allocation functions
  • 6. DQDB Layer Protocol Data Unit (PDU) formats
    • 6.1 Ordering principles
    • 6.2 Slot
      • 6.2.1 Access Control Field (ACF)
    • 6.3 Queued Arbitrated (QA) slot
      • 6.3.1 QA segment
    • 6.4 Pre-Arbitrated (PA) slot
      • 6.4.1 PA segment
    • 6.5 Transfer of MAC Service Data Unit (MSDU)
      • 6.5.1 Initial MAC Protocol Data Unit (IMPDU)
      • 6.5.2 Derived MAC Protocol Data Unit (DMPDU)
    • 6.6 Protocol Data Unit (PDU) Hierarchy for MAC Service
    • 6.7 Node conformance requirements
  • 7. DQDB Layer facilities
    • 7.1 Timer
      • 7.1.1 Reassembly IMPDU Timer (RIT)
      • 7.1.2 Head of Bus Arbitration Timer (Timer_H)
    • 7.2 Counters
      • 7.2.1 Request counter (REQ_I_CNTR)
      • 7.2.2 Countdown counter (CD_I_CNTR)
      • 7.2.3 Local request queue counter (REQ_I_Q)
      • 7.2.4 Page counter (PAGE_CNTR)
      • 7.2.5 Bandwidth balancing counter (BWB_CNTR)
      • 7.2.6 Transmit sequence number counter (TX_SEQUENCE_NUM)
    • 7.3 System parameters
      • 7.3.1 Reassembly IMPDU timer period (RIT_PERIOD)
      • 7.3.2 Head of Bus Arbitration Timer period (Timer_H_PERIOD)
      • 7.3.3 Quality of service map (QOS_MAP)
      • 7.3.4 Reserved number of MID pages (RESERVED_MID_PAGES)
      • 7.3.5 Maximum number of MID pages (MAX_MID_PAGES)
      • 7.3.6 Bandwidth balancing modulus (BWB_MOD)
    • 7.4 Flags
      • 7.4.1 Configuration Control Flag (CC_12_CONTROL)
      • 7.4.2 Default Configuration Control Flag (CC_D2_CONTROL)
      • 7.4.3 CRC32 Generation Flag (CRC32_GEN_CONTROL)
      • 7.4.4 CRC32 Checking Flag (CRC32_CHECK_CONTROL)
    • 7.5 Resource status indicators
      • 7.5.1 Configuration Control Status Indicator (CC_STATUS)
      • 7.5.2 Head of Bus Operation Indicator (HOB_OPERATION)
      • 7.5.3 Link Status Indicator (LINK_STATUS)
      • 7.5.4 External Timing Source Status Indicator (ETS_STATUS)
  • 8. DQDB Layer operation
    • 8.1 Distributed Queue operation
      • 8.1.1 Distributed Queue State Machine (DQSM)
      • 8.1.2 REQ Queue Machine (RQM)
      • 8.1.3 Bandwidth Balancing Machine (BWBM)
    • 8.2 Reassembly operation
      • 8.2.1 Reassembly State Machine (RSM)
    • 8.3 Segment Header Check Sequence (HCS) processing
  • 9. DQDB Layer Management Interface (LMI)
    • 9.1 DQDB LMI model
      • 9.1.1 DQDB LMI primitives
    • 9.2 Virtual Channel Identifier (VCI) Management functions
      • 9.2.1 LM-ACTION invoke (CL_VCI_ADD)
      • 9.2.2 LM-ACTION invoke (CL_VCI_DELETE)
      • 9.2.3 LM-ACTION invoke (OPEN_CE_ICF)
      • 9.2.4 LM-ACTION invoke (OPEN_CE_COCF)
      • 9.2.5 LM-ACTION invoke (CLOSE_CE)
      • 9.2.6 LM-ACTION invoke (PA_VCI_ADD_HOB)
      • 9.2.7 LM-ACTION invoke (PA_VCI_DELETE_HOB)
    • 9.3 Header Extension Management functions
      • 9.3.1 LM-ACTION invoke (HEXT_INSTAL)
      • 9.3.2 LM-ACTION invoke (HEXT_PURGE)
    • 9.4 Message Identifier (MID) Management functions
      • 9.4.1 LM-ACTION invoke (MID_PAGE_GET)
      • 9.4.2 LM-ACTION reply (MID_PAGE_GET)
      • 9.4.3 LM-ACTION invoke (MID_PAGE_RELEASE)
      • 9.4.4 LM-ACTION reply (MID_PAGE_RELEASE)
      • 9.4.5 LM-EVENT notify (MID_PAGE_LOST)
    • 9.5 Address Management functions
      • 9.5.1 LM-ACTION invoke (ADDRESS_ADD)
      • 9.5.2 LM-ACTION invoke (ADDRESS_DELETE)
    • 9.6 System Parameter Management functions
      • 9.6.1 LM-SET invoke (SYSTEM_PARAMETER)
    • 9.7 Configuration Control function management functions
      • 9.7.1 LM-SET invoke (CC_FLAG)
    • 9.8 CRC32 Control Flag Management functions
      • 9.8.1 LM-SET invoke (CRC32_FLAG)
    • 9.9 Other management functions
      • 9.9.1 LM-ACTION invoke (RESET)
    • 9.10 Summary of DQDB LMI primitives
  • 10. DQDB Layer Management protocol
    • 10.1 DQDB Layer Management Information octets
      • 10.1.1 Bus Identification Field (BIF)
      • 10.1.2 Subnetwork Configuration Field (SNCF)
      • 10.1.3 MID Page Allocation Field (MPAF)
    • 10.2 Configuration Control protocol
      • 10.2.1 Allowed combinations of Configuration Control functions in a node
      • 10.2.2 Resources controlled by each Configuration Control function type
      • 10.2.3 Generation of SNCF subfields
      • 10.2.4 Default Configuration Control State Machine
      • 10.2.5 Configuration Control Type 2 State Machine
      • 10.2.6 Configuration Control Type 1 State Machine
    • 10.3 MID Page Allocation protocol
      • 10.3.1 Page Counter State Machine (PCSM) for head of Bus A
      • 10.3.2 Page reservation State Machine for head of Bus A
      • 10.3.3 Page Counter Modulus Operation for head of Bus A
      • 10.3.4 Page Counter State Machine (PCSM) for Bus A or Bus B
      • 10.3.5 Keep Page State Machine (KPSM)
      • 10.3.6 Get Page State Machine (GPSM)
  • 11. Physical Layer principles of operation
    • 11.1 Architectural considerations
    • 11.2 Node configuration
    • 11.3 Duplex operation of the transmission link
      • 11.3.1 Physical Layer Connection State Machine (PLCSM)
      • 11.3.2 Link Status Signal (LSS)
    • 11.4 Node synchronization
    • 11.5 Physical Layer Maintenance functions
      • 11.5.1 Fault detection within nodes
      • 11.5.2 Node isolation
      • 11.5.3 Fault detection on transmission links
      • 11.5.4 Nodes not supporting Head of Bus functions
    • 11.6 Physical Layer facilities
      • 11.6.1 Physical Layer Connection State Machine (PLCSM) Control Flag
      • 11.6.2 Head of Bus Capable Flag (HOB_CAPABLE)
  • 12. Physical Layer Convergence Procedure (PLCP) for DS1-based systems
  • 13. PLCP for DS3-based systems
    • 13.1 Overview
      • 13.1.1 DS3 relationship to the PLCP
      • 13.1.2 SDS3 fiber extension of simplified DS3 signal transmission system relationship to the PLCP
    • 13.2 The PLCP frame format
    • 13.3 PLCP field definitions
      • 13.3.1 Framing octets (A1, A2)
      • 13.3.2 Path Overhead Identifier (P11-P0)
      • 13.3.3 PLCP Path Overhead octets
      • 13.3.4 Trailer nibbles
    • 13.4 PLCP behavior during faults
    • 13.5 PLCP behavior during DQDB Layer out-of-service
    • 13.6 PLCP framing
      • 13.6.1 LSS operations table
      • 13.6.2 Physical Layer Frame Timing operations table
  • 14. PLCP for CCITT Recommendation G.703 (2.048 Mbit/s)
    • 14.1 Overview
      • 14.1.1 E1 relationship to the PLCP
    • 14.2 The PLCP frame format
    • 14.3 PLCP field definitions
      • 14.3.1 Framing octets (A1, A2)
      • 14.3.2 Path Overhead Identifier (P9-P0)
      • 14.3.3 PLCP Path Overhead octets
      • 14.3.4 Trailer octets
    • 14.4 PLCP behavior during faults
    • 14.5 PLCP behavior during DQDB Layer out-of-service
    • 14.6 PLCP framing
      • 14.6.1 LSS operations table
      • 14.6.2 Physical Layer Frame Timing operations table
  • 15. PLCP for CCITT Recommendations G.751 and G.703 (34.368 Mbit/s)
    • 15.1 Overview
      • 15.1.1 E3 relationship to the PLCP
    • 15.2 The PLCP frame format
    • 15.3 PLCP field definitions
      • 15.3.1 Framing octets (A1, A2)
      • 15.3.2 Path Overhead Identifier (P8-P0)
      • 15.3.3 PLCP Path Overhead octets
      • 15.3.4 Trailer octets
    • 15.4 PLCP behavior during faults
    • 15.5 PLCP behavior during DQDB Layer out-of-service
    • 15.6 PLCP framing
      • 15.6.1 LSS operations table
      • 15.6.2 Physical Layer Frame TIming operations table
  • 16. PLCP for CCITT Recommendations G.751 and G.703 (139.264Mbit/s)
    • 16.1 Overview
      • 16.1.1 E4 relationship to the PLCP
    • 16.2 The PLCP frame format
    • 16.3 PLCP field definitions
      • 16.3.1 Framing octets (A1, A2)
      • 16.3.2 Path Overhead Identifier (P36-P0)
      • 16.3.3 PLCP Path Overhead octets
      • 16.3.4 Trailer octets
    • 16.4 PLCP behavior during faults
    • 16.5 PLCP behavior during DQDB Layer out-of-service
    • 16.6 PLCP framing
      • 16.6.1 LSS operations table
      • 16.6.2 Physical Layer Frame Timing operations table
  • 17. PLCP for CCITT Recommendations G.707, G.708, and G.709 SDH-based systems (155.520 Mbit/s)
    • 17.1 Overview
      • 17.1.1 SDH relationship to the PLCP
    • 17.2 The PLCP frame format
    • 17.3 PLCP Path Overhead (POH) field definitions
      • 17.3.1 Path trace (J1)
      • 17.3.2 Bit Interleaved Parity-8 (B3)
      • 17.3.3 Signal label (C2)
      • 17.3.4 Path status (G1)
      • 17.3.5 Multiframe Indicator (H4)
      • 17.3.6 DQDB Layer Management Information octets (M2, M1)
      • 17.3.7 Growth octets
    • 17.4 PLCP behavior during faults
    • 17.5 PLCP behavior during DQDB Layer out-of-service
    • 17.6 PLCP operation
      • 17.6.1 Receiver operation
      • 17.6.2 Transmitter operation
      • 17.6.3 LSS operations table
      • 17.6.4 Physical Layer Frame Timing operations table
    • A.1 Introduction
    • A.2 Instructions for completing the PICS proforma
      • A.2.1 Status symbols
      • A.2.2 Other symbols
      • A.2.3 General structure of the PICS proforma
      • A.2.4 Additional Information
      • A.2.5 Exception Information
      • A.2.6 Conditional status
    • A.3 Identification
      • A.3.1 Implementation identification
      • A.3.2 Protocol summary, ISO/IEC 8802-6 : 1994 [ANSI/IEEE Std 802.6, 1994 Edition]
      • A.3.3 Claimed conformance to ISO/IEC 8802-6 : 1994 [ANSI/IEEE Std 802.6, 1994 Edition]
    • A.4 Major capabilities and features commonly used as predicates
      • A.4.1 Major capabilities
      • A.4.2 Features commonly used as predicates
    • A.5 DQDB node functional description
      • A.5.1 Provision of MAC service to LLC
      • A.5.2 Provision of isochronous service
      • A.5.3 Provision of other services
      • A.5.4 Common functions
    • A.6 DQDB Layer Protocol Data Unit (PDU) formats
      • A.6.1 Ordering principles
      • A.6.2 Slot
      • A.6.3 Queued Arbitrated (QA) slot
      • A.6.4 Pre-Arbitrated (PA) slots
      • A.6.5 Transfer of MAC Service Data Unit (MSDU)
    • A.7 DQDB Layer facilities
      • A.7.1 Timers
      • A.7.2 Counters
      • A.7.3 System parameters
      • A.7.4 Flags
      • A.7.5 Resource status indicators
    • A.8 DQDB Layer operation
      • A.8.1 Distributed Queue operation
      • A.8.2 Reassembly operation
      • A.8.3 Segment Header Check Sequence (HCS) processing
    • A.9 DQDB Layer Management Interface (LMI)
      • A.9.1 DQDB LMI model
      • A.9.2 DQDB Layer Management primitives in support of Virtual Channel Identifier (VCI) Management functions
      • A.9.3 DQDB Layer Management primitives in support of Header Extension Management functions
      • A.9.4 DQDB Layer Management primitives in support of Message Identifier (MID) Management functions
      • A.9.5 DQDB Layer Management primitives in support of Address Management functions
      • A.9.6 DQDB Layer Management primitives in support of System Parameter Management functions
      • A.9.7 DQDB Layer Management primitives in support of Configuration Control Management functions
      • A.9.8 DQDB Layer Management primitives in support of CRC32 Control Flag Management functions
      • A.9.9 DQDB Layer Management primitives in support of other management functions
    • A.10 DQDB Layer Management protocol
      • A.10.1 DQDB Layer Management Information octets
      • A.10.2 Configuration Control protocol
      • A.10.3 Mid Page Allocation protocol
    • A.11 Physical Layer principles of operation
      • A.11.1 Physical Layer maintenance functions
      • A.11.2 Physical Layer facilities
    • A.12 Physical Layer Convergence Procedure (PLCP) for DS1-based systems
    • A.13 PLCP for DS3-based systems
      • A.13.1 Overview
      • A.13.2 The PLCP frame format
      • A.13.3 PCLP field definitions
      • A.13.4 PLCP behavior during faults
      • A.13.5 PLCP behavior during DQDB Layer out-of-service
      • A.13.6 PLCP framing
    • A.14 PLCP for CCITT Recommendation G.703 (2.048 Mbit/s)
    • A.15 PLCP for CCITT Recommendations G.751 and G.703 (34.368 Mbit/s)
    • A.16 PLCP for CCITT Recommendations G.751 and G.703 (139.264 Mbit/s)
    • A.17 PLCP for CCITT Recommendations G.707, G.708, and G.709 (155.520 Mbit/s)
    • B.1 Introduction
    • B.2 Call establishment model
    • B.3 Call establishment procedures
      • B.3.1 Originating side
      • B.3.2 Terminating side
    • B.4 Call clearing procedures
      • B.4.1 Signalling termination communication with Bandwidth Manager and VCI Server function
    • B4.2 Bandwidth Manager and VCI Server function communication with terminating node
    • B4.3 Bandwidth Manager and VCI Server function communication with Head of Bus function
    • C.1 Introduction
    • C.2 Bothways transmission
    • C.3 Bus selection tables
    • C.4 Self-learned tables
    • C.5 Table maintenance by aging out
    • C.6 A Distributed scheme for table maintenance
    • G.1 Introduction
    • G.2 Rationale for the hierarchy
    • I.1 Overview
    • I.2 Configuration Control protocol facilities
    • I.3 Rationale for the Head of Bus Arbitration Timer
    • I.4 Example of Configuration Control protocol

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